1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3de57c74e224c2bc4808b32ed7e15a86ce585d446fe5c12abb741b4ace8a5f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43b08351-a73a-40bc-bcca-46e180f94d70.json and https://artists.proofprofile.net/proofs/artist/43b08351-a73a-40bc-bcca-46e180f94d70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40269a052dac4761996f00f2d8ff00c80466b8bcf24e01224cc9d84d3e45345a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60750828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d887cfcf42f2cc9bc19238397374288e6b9c466d7ca2553aa2b90aaf4e4e533. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60750830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cb868b3e948e020298285ad85e94a0fa883185b5fc394189412b18d9a2b0c6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60750831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc13f70013da5043b071ef3bf4ec89515f7c116a673e3368cbb3b6adc429e959. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60750835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c99fdd7013a7d956ce36842264aaa412085934e7ff535d536dfb91090cf67e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:36:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ2J21507962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a09800d58946d8a8422254217bb6645b79773219073771524706db7844a8a3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:18:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ2J21507964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d424d97c6fc58537305db73da9ddc1ebf49945cc66ddcd6e44c02ad3af04cb7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60320190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21255df2ccfab02f4d2d509b3cc21716c653c70b713d0822f889c67746072fe. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60320191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4399821b49f90e687b13d2940f76dbedacd0184654d3bcb868d86ac517c9b82. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60320192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb94651bce7fc5647e3d4635d52cd0788268bc7c1f1ab433d930ccbcf9fa010f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCG60350182.
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